Last week the Feds unsealed 200 pages of evidence against Barry Bonds.

They plan to use it in March when the former San Francisco Giants slugger stands trial on charges he perjured himself before a grand jury in the 2003 BALCO case by claiming he never knowingly used steroids.

The documents tie the all-time home run king to 4 positive tests. They also include doping calendars and transcripts of a secretly-taped conversation in which Greg Anderson, Bonds’ longtime trainer and confidant says he injected Bonds with the juice.

Anderson has racked up more than a year behind bars for contempt by famously refusing to testify before that very same grand jury. His obstinance may yet invalidate some parts of the Fed’s case.

Three of the 4 positive tests date to 2000-2001 and were performed at the Bay Area Laboratory Co-operative. The fourth, a specimen collected by MLB in 2003 showed the designer steroid THG, a synthetic testosterone and clomid, a female fertility drug.

That specimen had come up clean using MLB-sanctioned tests, but it was seized by the Feds a year later and handed over to the UCLA Olympic Analytical Lab which found the goods.

The tape-recorded conversation took place in 2003. It involved Steve Hoskins, a former Bonds business manager, and Anderson. Transcripts reveal Anderson saying he injected Bonds with designer steroids that weren’t detectable at the time.

Hoskins and Bonds had been childhood friends that reconnected when Bonds returned to the Bay area to play Left for the Giants in 1993. They had a spat in 2003 and next thing you know, Hoskins was wearing a wire for the Feds.

In sworn testimony before the BALCO grand jury, Bonds admitted using “the clear” and “the cream,” but claimed he did not know they were laced with performance enhancing substances.